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Creating your own header file in C
... that this code doesn't work if you try to just build it by button ("build and run" in Code::Blocks for example). It might seem obvious for you but for me it's the first time it has happened and it took me quite some time to figure out where is the problem.
– Jeyekomon
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Specify custom Date format for colClasses argument in read.table/read.csv
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You can write your own function that accepts a string and converts it to a Date using the format you want, then use the setAs to set it as an as method. Then you can use your function as part of the colClasses.
Try:
setAs("character","myDate", function(from) as.Date(from, for...
Where do I find the definition of size_t?
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From Wikipedia
The stdlib.h and stddef.h header files define a datatype called size_t1 which is used to represent the size of an object. Library functions that take sizes expect them to be of type size_t, and the sizeof operator evaluates to size_t.
The...
How to execute a java .class from the command line
...classpath ( where java looks for .class definitions )
If that's the case and listing the contents of your dir displays:
Echo.java
Echo.class
Then any of this may work:
java -cp . Echo "hello"
or
SET CLASSPATH=%CLASSPATH;.
java Echo "hello"
And later as Fredrik points out you'll get an...
How to convert a Git shallow clone to a full clone?
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Neither answer worked for me. Both commands succeeded in fetching all the missing commits, but when I try to push new commits, I get an error about the server not knowing about 'shallow' refs
– Tyguy7
Sep 19 '15 at 0:08
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How to pass object with NSNotificationCenter
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You'll have to use the "userInfo" variant and pass a NSDictionary object that contains the messageTotal integer:
NSDictionary* userInfo = @{@"total": @(messageTotal)};
NSNotificationCenter* nc = [NSNotificationCenter defaultCenter];
[nc postNotificationName:@"eRXRe...
virtualenvwrapper and Python 3
I installed python 3.3.1 on ubuntu lucid and successfully created a virtualenv as below
9 Answers
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How to find whether or not a variable is empty in Bash
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In Bash at least the following command tests if $var is empty:
if [[ -z "$var" ]]; then
# Do what you want
fi
The command man test is your friend.
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Moment JS - check if a date is today or in the future
...ardless if time difference is less than 24 hours.
– zanderwar
May 12 '16 at 4:51
3
Not working fo...
How do I pass command-line arguments to a WinForms application?
... cant believe i saw that 'string[] args' so many times after a whole year and it never occured to me wtf it was untill now ! haha
– Niklas
Jun 28 '16 at 18:31
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